As mentioned previously, it's not advisable for anyone, but sometimes unavoidable, to have a break(s) during treatment unless "per your doctor." Any unplanned breaks can have an effect on the efficiency of radiation treatment, and gives a chance for the tumor to repopulate. These days are usually "made up" if one can really say that, by coming in a 6th day or adding them at the end, and not sure if they can change the treatment plan now to have daily rads 2x daily, and with the neck tissue issues. There is really nothing that can be done, other than to start treatment as soon as he can, and when the center is open. Although, mine sent us to a sister hospital, mask and all, after several days due to power loss from Sandy, being these machines use to much power for a power generator an handle. Good luck with everything.